Bushing for millstone-spindles



(No Model.)

J. A. MGALLISTER.

BUSHING FOR MILLSTONE SPINDLES'.

nvezor, f

` Wses,

,l'l-'NirEn STATES JAMES A. 4MOALLIS'IER, OF SHELBYVILLE, ILLINOIS.

BUSHING FOR IVIILLSTONE-SPINDLES.

SPECIFICATION forming part 0f Letters Patent No. 290,904-, dated December 25, 1888,

Application filed April El, 1883. (No model.)

To all whom it may concern,.-

Be it known that I, JAMES A. McALLIsrER, of Shelbyville, in the county' of Shelby and State of Illinois, have invented a'new and use ful Bushing for MillstonaSpindles; and I do hereby .declare that the following is a full, clear, and exact description of the construction and operation of the same.

My invention relates to bushings for millstone-spindles; and it consists in the improved combinations of devices, hereinafter described and claimed, whereby a positive bearing for the spindle is secured, and the adjustment of the bushing, to either'tighten or loosen the same, is readily effected.

In the accompanying' drawings, forming part of this'speciication, Figure lis a side elevation of a portion of a inillstone-spindle and bushing therefor constructed in accordance with my invention or having my improvements embodied therein. vertical section of the same, and Fig. 3 is an inverted plan.

The spindle A rests in the bushing B, between which andthe casing, at each of the four sides thereof, is located a key-section, D, which is tapered from its bottom to its top, to exert a wedge-like action upon the bushing when moved vertically upward. Rods a, having heads b, bent to engage perforations in the lower portions of the keys, are threaded at their lower extremities,and depend through perforations in brackets E, secured to the under side of a plate, I, clamped to the under side of the bushing and case. Sprocketwheels F have internally-threaded hubs e,

the sprocket-wheels F, as clearly seen in Fig,y

3. The plate I, at one of its corners, has an extension or ear, h, Figs. l and 3, perforated to receive the j ournal'of a depending coneyJ, against the lower face of which is fulcrumed Fig. 2 is a.

a lever7 K, the said lever being provided witha slot, t', Fig. 3, through-which passes the threaded extremity j, of the jou'rnahfand with which threaded extremity j of thel journal engages a nut, Z. The cone .I permitsfthe lever Kto be swung in an arc of a circle upon the journal. By placingthe forward end of the lever K within oneof the linkslof the sprocketchain II, and by swinginglsaid-'lever upon its pivotal bearing, a limited movement of the sprocketchain H is secured,i`and.the consequent limited rotation of each of the sprocket-wheels F effected. The rotation of the sprocket-wheelscF in `either `direction causes the ascending or descending movement of therod a, and consequent elevation` or jdescent of the keys D. The ascent of the keys D causes said keys to wedge themselves rigidly between 'thebushingjB and the fcase' C, thus affording a firm and positive bearing for the spindle A. 'Ihe descent of the'keysD results in the withdrawal of the wedging' action of the same.

" It will thus be seen that by employing a construction 'like that ,herein described a tightening and looseningadjustment'of the bushing-boxes for milllspindles can be quickly and easily effected with the expenditure of a minimum amount of power.

I claimt l. rlhe combination. with the bushing-box for mill-spindles and the bushing, of keys interposed between each side of the casing and bushing, having threaded depending` rods, nuts through which said' rods pass, depending :brackets having supporting-bars, l said nuts being located betweenv said bars, and devicesffor effecting the rotation of the nuts, substantially as and for the purpose set forth. ,2.v The combination, with` the bushing-box for mill spindles, of the bushing, wedge- Ashaped keys havingthreaded depending 2 wager 3. The Combination, with it bushngbox :L lever fuleruxnedas described, and adapted for mill-spindles, of the bushing, keys hzwto move the chain H, substantially as and for lo iup; rods a, secured to and depending therethe purpose set forth. from br'tekets E havin@ Crossplates plate H the eross- )lates and s )rocket-wheels beine,

r l l t perforated for the passage of the rods a', and

L, HIGGINBOTTOM, XV. W. HETT.

eross-plates of the brackets, zt sproeketelmin, ln presence of* 

